Recognizing mustache variables with alternative delimiter?

I'm creating a web2py project.  In web2py views, the {{ }} type delimiters are used in the templating language.  I also have an Ractive template in the same view.  To avoid conflicts, I changed the Ractive delimiters to square brackets ([[ ]]).  This all works fine, but pycharm doesn't expect the square brackets and peppers my page with errors.  Is there any way to let it know that both styles of delimiter denote template variables?

Thanks!